89943631 has 4 divisors (see below), whose sum is σ = 90834264. Its totient is φ = 89053000.

The previous prime is 89943613. The next prime is 89943653. The reversal of 89943631 is 13634998.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89943631 is a prime.

It is a super-2 number, since 2×89943631² = 16179713514928322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89943611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445165 + ... + 445366.

It is an arithmetic number, because the mean of its divisors is an integer number (22708566).

Almost surely, 2^89943631 is an apocalyptic number.

89943631 is a deficient number, since it is larger than the sum of its proper divisors (890633).

89943631 is a wasteful number, since it uses less digits than its factorization.

89943631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890632.

The product of its digits is 139968, while the sum is 43.

The square root of 89943631 is about 9483.8616080160. The cubic root of 89943631 is about 448.0468950033.

The spelling of 89943631 in words is "eighty-nine million, nine hundred forty-three thousand, six hundred thirty-one".